![八年級英語下冊Unit9課件_第1頁](http://file4.renrendoc.com/view/d02f8889cf8c3cb66b1bfce83667cc9e/d02f8889cf8c3cb66b1bfce83667cc9e1.gif)
![八年級英語下冊Unit9課件_第2頁](http://file4.renrendoc.com/view/d02f8889cf8c3cb66b1bfce83667cc9e/d02f8889cf8c3cb66b1bfce83667cc9e2.gif)
![八年級英語下冊Unit9課件_第3頁](http://file4.renrendoc.com/view/d02f8889cf8c3cb66b1bfce83667cc9e/d02f8889cf8c3cb66b1bfce83667cc9e3.gif)
![八年級英語下冊Unit9課件_第4頁](http://file4.renrendoc.com/view/d02f8889cf8c3cb66b1bfce83667cc9e/d02f8889cf8c3cb66b1bfce83667cc9e4.gif)
![八年級英語下冊Unit9課件_第5頁](http://file4.renrendoc.com/view/d02f8889cf8c3cb66b1bfce83667cc9e/d02f8889cf8c3cb66b1bfce83667cc9e5.gif)
版權(quán)說明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請進(jìn)行舉報或認(rèn)領(lǐng)
文檔簡介
Unit9HaveyoueverbeentoUnit91SectionA1a-2cSectionA1a-2c2Doyouknowtheplaces?TheGreatWalltheWestLakeDapengMountainThemeParkDoyouknowtheplaces?TheGre3DapengMountain
ThemeParkHaveyoueverbeen
toDapengMountainThemePark?/No,Ihaven’t.Yes,Ihave.DapengMountainThemeParkHave4anamusementparkHaveyoueverbeen
to…?/No,Ihaven’t.Yes,Ihave.anamusementparkHaveyouever5an
aquariumHaveyoueverbeen
to…?No,I’veneverbeento….anaquariumHaveyoueverbeen6azooHaveyoueverbeen
to…?/No,Ihaven’t.Yes,Ihave.Metoo.azooHaveyoueverbeento…?/7waterparkHaveyoueverbeen
to…?/No,Ihaven’t.Yes,Ihave.Meneither.waterparkHaveyoueverbeen8aspacemuseumHaveyoueverbeen
to…?/No,Ihaven’t.Yes,Ihave.aspacemuseumHaveyoueverb9A:Haveyoueverbeento…?B:Yes,Ihave.No,Ihaven’t.No,never.Haveyoueverbeento…?A:Metoo.
Meneither.PairworkA:Haveyoueverbeento…?B:10listen.Havethesestudentseverbeentotheseplaces?
AmusementparkWaterparkSpacemuseumAquariumZooClaudiaSarah1bA:HasClaudia/Saraheverbeento…?B:Yes,shehas./No,shehasn’t.listen.Havethesestudent11Haveyoueverbeentoanamusementpark?Yes,Ihave.IwenttoFuntimesAmusementParklastyear.Haveyoueverbeentoawaterpark?spacemuseum____amusement_____aquarium______zoo_______waterpark________Whichoftheseplaceswouldyouliketovisit?Rankthemfrom1to5.1aHaveyoueverbeentoanamuse12ExerciseMatchthequestionswiththeanswers.HaveyoueverbeentoEurope?HassheeverbeentoBrazil?Hasheeverbeentoyourschool?HasJohneverbeentoanaquarium?HasAliceeverbeentoanaquarium?Haveyoueverbeentomyhouse?F.Yes,hehas.Hevisitedus.Yes,hehas.Andheenjoyeditalot.B.Yes,shehas.Andshetouchedadolphin.C.No,Ihaven’t.ButI’vebeentoAfrica.D.No.ButI’mcomingtoyourpartytonight.E.Yes,shehas.ExerciseMatchthequestionswi132aListenandcircletheplacesyouhear.2aListenandcircletheplaces142bListenandcircletheplacesyouhear.Conversation1Conversation2Conversation3Tinawenttothepacemuseumlastyear.Johnhasneverbeentothespacemuseum.Theyaregoingto
takethesubway.Lindahasbeentotheaquarium.Lindawenttothezoothreetimeslastyear.Lindaisgoingtothezooagainnextweek.HarveyhadagreattimeatWaterWorld.Harvey’sfriendhasneverbeentoWaterWorld.Harveyandhisfriendaregoinginlineskating.TTTTTTTTTFFFFFFFFF2bListenandcircletheplaces15
LookatthemapofChinaandworkwithyourpartner.Talkaboutplacesyouhavebeenandplacesyouwanttogo.TalkabouthowyouwillgettotheseplacesWherehaveyoubeen?------Ihavebeento……Wheredoyouwanttogo?------Iwanttogo…….Howareyougoingthere?------I……PairworkLookatthemapofChinaand16談?wù)撌欠竦竭^某處1.havebeento到過某處
肯定形式:主+have(has)beento+地點(diǎn).否定形式:主+haven’t(hasn’t)beento+地點(diǎn).疑問形式:Have(Has)+主+beento+地點(diǎn)?Have/has稱為“助動詞”,been為be的過去分詞。havebeen構(gòu)成現(xiàn)在完成時態(tài)。2.havebeento與havegoneto的區(qū)別。havebeento到過某處,havegoneto到某處去了,但還沒回來。HehasgonetoBeijing.他到北京去了。(他不在此處,還沒有從北京回來。)HehasbeentoBeijing.他去過北京。(他已經(jīng)從北京回來了。)GrammarFocusHaveyoueverbeentoanYes,I’vebeentoanaquarium.aquarium?No,Ihaven’t.No,I’veneverbeentoanaquarium.Ihavebeentothezooalotoftimes.Me,too.I’veneverbeentoawaterpark.Meneither.談?wù)撌欠竦竭^某處1.havebeento到過某處G17SectionA3a-4SectionA3a-418A:Haveyoueverbeento…?B:Yes,Ihave.No,Ihaven’t.No,never.Haveyoueverbeento…?A:Metoo.
Meneither.PairworkA:Haveyoueverbeento…?B:19----Haveyoueverwateredtheflowers?----Yes,Ihave./No,Ihaven’t.whataboutyou?----Metoo./Meneither.MinnieMouse
美妮----Haveyoueverwateredthe20----Haveyoueverskated?----Yes,Ihave./No,Ihaven’t.whataboutyou?----Metoo./Meneither.MickeyMouse米奇老鼠----Haveyoueverskated?----Y21----Haveyoueverhadaparty?----Yes,Ihave./No,Ihaven’t.whataboutyou?----Metoo./Meneither.Winniethepooh小熊維尼
Tigger跳跳虎
Piglet
小豬皮克利Eeyore
驢子咿唷
Owl貓頭鷹Rabbit兔子瑞比----Haveyoueverhadaparty?22----Haveyoueverdanced
ataparty?----Yes,Ihave./No,Ihaven’t.whataboutyou?----Metoo./Meneither.Cinderella仙蒂公主
----Haveyoueverdancedata23----Haveyoueversweptthefloor?----Yes,Ihave./No,Ihaven’t.whataboutyou?----Metoo./Meneither.SnowWhite----Haveyoueversweptthefl24Tarzan人猿泰山----Haveyoueverclimbedthetree?----Yes,Ihave./No,Ihaven’t.whataboutyou?----Metoo./Meneither.Tarzan人猿泰山----Haveyouevercl25----Haveyoueverdrivenacar?----Yes,Ihave./No,Ihaven’t.whataboutyou?----Metoo./Meneither.DonaldDuck----Haveyoueverdrivenacar26rollercoaster----Haveyouevertakenarollercoaster?----Yes,Ihave./No,Ihaven’t.whataboutyou?----Metoo./Meneither.rollercoaster----Haveyoueve27Mickey&MinnieDonaldDuckCinderellaWinniethe
poohEeyoreTigger&PigletOwlRabbitSnowWhiteDisneyCharactersMickey&MinnieDonaldDuckCinde28八年級英語下冊Unit9ppt課件293aRead.Thencircletheinterestingplacesorthingsandunderlinetheboringones.HaveyoueverbeentoDisneyland?
MostofushaveprobablyheardofMickeyMouse,DonaldDuckandmanyotherfamousDisneycharacters.Perhapswehaveevenseentheminthemovies.ButhaveyoueverbeentoDisneyland?Infact,therearenowfourdifferentDisneylandamusementparks,twoareintheUSA,oneisinJapan,andtheotherisinFrance.
Disneylandisanamusementpark,butwecanalsocallitathemepark.Ithasallthenormalattractionsthatyoucanfindatanamusementpark,butitalsohasatheme.Thetheme,ofcourse,isDisneymoviesandDisneycharacter.Forexample,youcanfindaroller
coasterinmostamusementparks,butinDisneyland,thethemeoftherollercoasterisDisneycharacters.ThismeansthatyoucanfindDisneycharactersallovertherollercoaster.YoucanalsowatchDisneymovies,eatinDisneyrestaurants,andbuyDisneygifts.AndyoucanseeDisneylandcharacterswalkingaroundDisneylandallthetime!HaveyoueverheardofaDisneyCruise?ThesearehugeboatsthatalsohavetheDisneytheme.Youcantakearide
ontheboatforseveraldays,andyoucansleepandeatonboard,Therearealsomanyattractionsonboard,justlikeanyotherDisneyland.Youcanshop,gotoDisneyparties,andeatdinnerwithMickeyMouse!Theboatridesalltakedifferentroutes,buttheyallend
upinthesameplace.ThatisDisney’sownisland.ItisjustSomuchfuninDisneyland!3aRead.Thencircletheintere30HaveyoueverbeentoDisneyland?
MostofushaveprobablyheardofMickeyMouse,DonaldDuck,andmanyotherfamousDisneycharacters.Perhaps
wehaveevenseentheminmovies.ButhaveyoueverbeentoDisneyland?Infact,therearenowfourdifferentDisneylandamusementparks,twoareintheUSA,oneisinJapan,andtheotherisinFrance.Disneylandisanamusementpark,butwecanalsocallitathemepark.Ithasallthenormalattractionsthatyoucanfindatanamusementpark,butitalsohasatheme.Thetheme,ofcourse,isDisneymoviesandDisneycharacters.Forexample,youcanfindarollercoasterinmostamusementparks,butinDisneyland,therollercoasteristhemedwithDisneycharacters.
在這個樂園里你可以見到游樂園都有的有吸引力的形象,然而它是有主題的.v.聽說,聽到也許我們在電影中見到過他們.主題普通的,正常的有吸引力的人或事過山車以…為主題人物,角色HaveyoueverbeentoDisneyla31ThismeansthatyoucanfindDisneycharactersallovertherollercoaster.YoucanalsowatchDisneymovies,eatinDisneyrestaurants,andbuyDisneygifts.AndyoucanseeDisneycharacterswalkingaroundDisneylandallthetime!HaveyoueverheardofaDisneyCruise?ThesearehugeboatsthatalsohavetheDisneytheme.Youcantakearideontheboatforseveraldays,andyoucansleepandeatonboard.Therearealsomanyattractionsonboard,justlikeanyotherDisneyland.Youcanshop,gotoDisneyparties,andeatdinnerwithMickeyMouse!Theboatstakedifferentroutes,buttheyallendupinthesameplace.ThatisDisney’sownisland.ItisjustsomuchfuninDisneyland!這就意味著你會在過山車上發(fā)現(xiàn)都是迪斯尼知名人物.seesb.doingsth.看見某人正在做某事你可以在船上游覽幾天,可以在船上睡覺、吃飯。巡游,游船在船上,在甲板上路線,航線結(jié)束于,終止于島嶼ThismeansthatyoucanfindD323aReadandfinishthefollowingtable.NumberofDisneyland_______________Character(特點(diǎn))ofDisneyland___________________ActivitiesinDisneyland____________________________________________________________________________________________________________AttractionsinDisneyland______________and_________________ActivitiesonDisneyCruise____________________________________________________________________DisneyCruiseendsup_______________________________.fourthemeparkWatchDisneymovies,eatinDisneyrestaurants,buyDisneygifts,andseeDisneycharacterswalkingaroundDisneylandallthetime.rollercoasterDisneyCruiseTakearide,eat,sleep,shop,gotoDisneypartiesandeatdinnerwithMickeyMouseinDisney’sownisland3aReadandfinishthefollowin333bModel:A:I’dliketogoonaDisneyCruise?B:What’sthat?A:It’slikeDisneyland,butit’sonaboat.B:Whydoyouwanttogoonthat?A:Well,youcantraveltoDisney’sownisland.Readagain.Thenwriteaconversation.Practicewithyourpartner.3bModel:A:I’dliketogoona34Pairwork4Model:A:Haveyouevertraveledtoanotherprovince?B:Yes,Ihave.Answerthesurveyandtheninterviewyourpartner.studiedwithmorethanthreefriends?traveledtoanotherprovinceofChina?saidsomethingyoudidn’twanttosay?helpedsomeoneyoudidn’tknow?livedinanotherplace?arguedwithyourparents?Haveyouever…YouYourpartnerPairwork4Model:A:Haveyouev35Sectionb1a-3aSectionb1a-3a36WhydoyoustudyEnglish?WhydoyoustudyEnglish?37IwanttounderstandEnglishlanguagemovies.It’sfuntolearnanotherlanguage.Iwanttotravel.IwanttostudyinanEnglish-speakingcountry.IwanttounderstandEnglishl38Iwanttobeatranslator.IwanttobeanEnglishtourguide.Iwanttobeatranslator.Iwa39OtherReasons:IlikeEnglishsongs.Iwanttomakeaforeignpen-pal.Iwanttotalkwithforeignteacherfreely.IwanttounderstandEnglishnewspapersandstorybooks.It’sverypopulartolearnEnglish.Ihaveto!OtherReasons:IlikeEnglishs40Pairwork1bCompareyouranswersinactivity1awithyourpartner.A:Forme,“Ihaveto!”isnumberfive.B:Really?Forme,“Ihaveto”isnumbertwo.Pairwork1bCompareyouranswer412aListentoateacherinterviewingastudent.Circlethequestionsyouhear.a.Howdoyouspellyourlastname?b.Whereareyoufrom?c.WhydoyouwanttoimproveyourEnglish?d.HaveyoueverbeentoanEnglish-speakingcountry?e.WhendidyoustartstudyingEnglish?f.HowlonghaveyoubeenstudyingEnglish?2aListentoateacherintervie422bListenagainandfillinthequestionnaire.Name:____________________StudyingEnglishfor:_________________________
English-speakingcountriesvisited:_____________
When:_____________________________________
ReasonsforlearningEnglish:__________________ThomasRuzicThreeyears.TheUnitedStatesWhenhewasthirteen.Hewantstotraveltheworld.2bListenagainandfillinthe43Pairwork2cModel:Lookatthequestionsinactivity2aandroleplaytheinterview.Useyourowninformation.A:Goodmorning.AreyouLeonardo,thenewexchangestudent?B:Yes,Iam.A:Welcometomyclass.Ineedtoaskyousomequestions…Pairwork2cModel:Lookatthequ44MeiShanDavidFengHilltopLanguageSchoolMeiShanDavidFengHilltopLang45ReadthisarticlefromtheHilltopLanguageSchoolnewsletterandanswerthefollowingquestions.CometotheHilltopLanguageSchoolandchangeyourlifeHere’swhattwoofourstudentssaidaboutourschool.fortwoyearsnow.It’sareallyinterestingjobbecauseItravelallovertheworld.IdiscoveredthatthemostimportantrequirementwastospeakEnglishwell,soIstudiedEnglishattheHilltopLanguageSchoolforfiveyearsbeforeIbecameaflightattendant.ItwasbecauseIcouldspeakEnglishthatIgotthejob.Thankyou,HilltopLanguageSchool!MeiShan3aIwanttobeatourguide.Infact,it’sallIhaveeverwantedtobe.Iwanttotravel,especiallytoEnglish-speakingcountriessuchastheUnitedStatesandAustralia.However,IknowthatIhavetoimprovemyEnglish,soI’vestartedtakinglessonsattheHilltopLanguageSchool.TheHilltopLanguageSchoolhasreallyhelpedmelearnEnglish.I’vebeenastudenthereforayearnow,andIreallyloveit.MaybewhenIleaveschoolI’llthinkaboutbecominganEnglishteacherratherthanatourguide!DavidFengWhenIwasayounggirl,alleverwantedtodowastraveling,andIdecidedthatthebestwaytodothiswastobecomeaflightattendantReadthisarticlefromtheHil461.WhatdoesMeiShando?2.Howlonghadshehadthejob?3.Whydidshewantthejob?4.HowlongdidshestudyEnglish?5.WhatkindofjobdoesDavidwant?6.HasheeverbeentoanEnglish-speakingcountry?7.Howlonghashebeenstudyingattheschool?8.Whatotherjobishethinkingofdoing?Sheisaflightattendant.Shehashadthejobfortwoyears.Shewantedtotravel.ShestudiedEnglishforfiveyears.Davidwantstobeatourguide.No.He’sbeenastudentforoneyear.HemightbecomeanEnglishteacherinstead.Questions1.WhatdoesMeiShando?Shei47CometotheHilltopLanguageSchoolandchangeyourlifeHere’swhattwoofourstudentssaidaboutourschool.WhenIwasayounggirl,alleverwantedtodowastraveling,andIdecidedthatthebestwaytodothiswastobecomeaflightattendantfortwoyearsnow.It’sareallyinterestingjobbecauseItravelallovertheworld.IdiscoveredthatthemostimportantrequirementwastospeakEnglishwell,soIstudiedEnglishattheHilltopLanguageSchoolforfiveyearsbeforeIbecameaflightattendant.ItwasbecauseIcouldspeakEnglishthatIgotthejob.Thankyou,HilltopLanguageSchool!MeiShanIwanttobeatourguide.Infact,it’sallIhaveeverwantedtobe.Iwanttotravel,especiallytoEnglish-speakingcountriessuchastheUnitedStatesandAustralia.However,IknowthatIhavetoimprovemyEnglish,soI’vestartedtakinglessonsattheHilltopLanguageSchool.TheHilltopLanguageSchoolhasreallyhelpedmelearnEnglish.I’vebeenastudenthereforayearnow,andIreallyloveit.MaybewhenIleaveschoolI’llthinkaboutbecominganEnglishteacherratherthanatourguide!DavidFengattendantn.出席者;參加者discoverv.發(fā)覺;發(fā)現(xiàn)requirementn.要求;必要條件guiden.導(dǎo)游takelessons上課ratherthan而不用于連接兩個并列結(jié)構(gòu)。其后可接do,todo或doing等形式。Here’swhattwoofourstudent483bWriteanarticleaboutyourselffortheschoolmagazine.Writeabout:ThekindofjobyouwantHowlongyouhavebeenstudyingEnglishWhyyoustartedstudyingEnglishWhatyoulikebestaboutstudyingEnglish3bWriteanarticleaboutyours49
1Fillintheblankswiththewordsgiven.SelfCheck
understanddeciderentimproveshow1.MyEnglishwritingisgood,butIneedto
mylisteningskills.2.Idon’t
.Couldyouexplainthatagain,please?3.That’saspecialcinema.Itonly
foreign
films.4.Haveyou
whatyouwanttodoafterschool?5.Youcan
bicyclesattheamusementpark.improveunderstandshowsdecidedrent1Fillintheblankswiththe50
2Interviewthreestudentsintheclassandcompletethechart.SelfCheck
Haveyouever…(student’sname)(student’sname)(student’sname)beentoanamusementpark?2Interviewthreestudentsin51
3Writeashortreportwiththeinformationabove.SelfCheck
MeiFanghasbeentoanamusementparkinGuangzhou.Shedidn’tenjoyitbecause…3Writeashortreportwithth52ReadingHaveyoueverbeentoSingapore?ReadingHaveyoueverbeento53Section1BeforeYouReadGROUPWORK2.Pleasefindoutaboutaplaceyouaregoingtovisit,writedownsomethingsyourgroupknowsaboutit.Russia:MoscowTheUnitedStates:NewYorkFrance:ParisAustralia:Sydney1.3.4.Section1BeforeYouReadGROUP54France:ParisTheUnitedStates:NewYorkAustralia:SydneyRussia:MoscowSydneyOperaHouseEiffelTower
StatueofLiberty
RedSquareinMoscow
France:ParisTheUnitedStates55Whatdoyouknowaboutthecountry?UnitedKingdomWhatdoyouknowaboutthecou56FranceWhatdoyouknowaboutthecountry?FranceWhatdoyouknowaboutt57ItalyWhatdoyouknowaboutthecountry?ItalyWhatdoyouknowaboutth58ChinaWhatdoyouknowaboutthecountry?ChinaWhatdoyouknowaboutth59AmericaWhatdoyouknowaboutthecountry?AmericaWhatdoyouknowabout60JapanWhatdoyouknowaboutthecountry?JapanWhatdoyouknowaboutth61Whatdoyouknowaboutthecountry?AustraliaWhatdoyouknowaboutthecou62WhatdoyouknowaboutSingapore?
WhatdoyouknowaboutSingapo63Section2WhileYouReadHaveyoueverbeentoSingapore?FormanyChinesetourists,thissmallislandinSoutheastisawonderfulplacetotakeaholiday.Ontheonehand,morethanthreequartersofthepopulationareChinese,soyoucansimplyspeakPutonghuaalotoftime.Ontheotherhand,SingaporeisanEnglish-speakingcountry,soit’sagoodplacetopracticeyourEnglish!population人口thenumberofpeoplesoutheast西南方wonderful奇跡般的quarter四分之一onefourth1WhereisSingapore?2WhatlanguagedopeoplespeakinSingapore?3WhycanwespeakChineseinSingapore?4CanwespeakEnglishthere?Why?Questions:Section2WhileYouReadHavey64Section2WhileYouRead1CanwefindanyChinesefoodthere?2WhatkindofChinesefoodcanwefind?3Canwetryanykindofnewfoodthere?4Whatkindsofnewfoodcanwefind?Questions:problemfindingrice,noodles,ordumplings.However,ifyou’refeelingbrave,Singaporeisanexcellentplacetotrynewfood.WhetheryoulikeIndianfood,westernfood,orJapanesefood,you’llfinditallinSingapore!HaveyouevertriedChinesefoodoutsideofChina?Maybeyoufearthatyouwon’tbeabletofindanythingtoeatinaforeigncountry.InSingapore,however,you’llfindalotoffoodfromChina.Youwon’thavea
溫馨提示
- 1. 本站所有資源如無特殊說明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
- 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
- 3. 本站RAR壓縮包中若帶圖紙,網(wǎng)頁內(nèi)容里面會有圖紙預(yù)覽,若沒有圖紙預(yù)覽就沒有圖紙。
- 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
- 5. 人人文庫網(wǎng)僅提供信息存儲空間,僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯,并不能對任何下載內(nèi)容負(fù)責(zé)。
- 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容,請與我們聯(lián)系,我們立即糾正。
- 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時也不承擔(dān)用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。
最新文檔
- 醫(yī)藥冷鏈運(yùn)輸服務(wù)合同
- 建筑工程人才中介合同
- 花店翻新墊資合同
- 行業(yè)專項作業(yè)指南 財務(wù)管理基礎(chǔ)
- 經(jīng)營用房租租賃合同書
- 印刷合同協(xié)議書
- 門衛(wèi)臨時聘用合同
- 軟件開發(fā)流程優(yōu)化與項目管理體系建立指南
- 員工離職后保密協(xié)議
- 購房協(xié)議和購房合同
- 五年級上冊口算練習(xí)400題及答案
- 關(guān)于闖紅燈的調(diào)查報告
- 決策與博弈論課件
- 為什么偉大不能被計劃
- 人大代表履職知識講座
- 精神障礙患者的社交技巧訓(xùn)練
- 危險物品管理制度
- 門靜脈炎護(hù)理課件
- 重慶八中2024屆高三12月高考適應(yīng)性月考卷(四) 語文試卷(含答案)
- 基礎(chǔ)研究成果向臨床轉(zhuǎn)化的實(shí)踐與挑戰(zhàn)
- 電流互感器試驗報告
評論
0/150
提交評論